I have been tinkering with a nifty little RaspberryPi clone made by
Lemaker and called
BananaPi (basically a RaspberryPi model B with 1 gigabyte memory, eSATA connector, and gigabit ethernet). It's the size of a deck of playing cards in it's clear acrylic case, and runs CentOS 7 Linux server operating system.
I have it running ntpd, named (DNS BIND), httpd, MariaDB, PHP, and MediaWiki. I'll probably put other things on it soon. Like any server, it should be monitored; so I was delighted to find an ARM based Splunk Forwarder at
https://splunkbase.splunk.com/app/1611 Now my logs and events are getting shipped to my Splunk indexer and I can monitor and graph anything that logs on the BananaPi.